fix

src/server.ts

@@ -112,7 +112,7 @@ app.post('/api/convert', async (req: Request, res: Response) => {
             // Test ffmpeg with simple command first
             try {
                 const { execSync } = require('child_process');
-                const result = execSync(`ffmpeg -i "${tempInputPath}" -t 1 -f null -`, { encoding: 'utf8', stdio: 'pipe' });
+                execSync(`ffmpeg -i "${tempInputPath}" -t 1 -f null -`, { encoding: 'utf8', stdio: 'pipe' });
                 console.log('FFmpeg file test passed');
             } catch (e: any) {
                 console.error('FFmpeg file test failed:', e.stderr || e.message);
@@ -197,7 +197,7 @@ app.get('/health', (req: Request, res: Response) => {
 });
 
 // Error handler
-app.use((err: Error, req: Request, res: Response, next: NextFunction) => {
+app.use((err: Error, req: Request, res: Response, _next: NextFunction) => {
     console.error(err.stack);
     res.status(500).json({ error: 'Something went wrong!' });
 });